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Ridwan Ridwan
Politeknik Negeri Lhokseumawe
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Mechanical Engineering

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Pembuatan Pembersih Lantai Alami dengan Ekstraksi Daun Sirih (Piper Betle L.) dan Serai Wangi (Cymbopogon Bernardus L.) terhadap Aktivitas Bakteri Jaida Tussakinah; Ridwan Ridwan; Nahar Nahar
Jurnal Teknologi Vol 26, No 1 (2026): April 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i1.8970

Abstract

This study aims to evaluate the effect of maceration time and composition ratio of betel leaf (Piper betle L.) and lemongrass (Cymbopogon nardus) extracts on the characteristics and antibacterial activity of natural floor cleaners. The extraction method used was maceration with soaking time variations of 2–6 days and extract composition ratios of 1:0, 0:1, 1:1, 1:2, and 2:1. The parameters analyzed included pH, density, organoleptic properties, and antibacterial activity using the colony counter method. The results showed that the pH increased from 5.2 to 7.2 with longer maceration time, while the density remained relatively stable in the range of 0.90–0.93 g/mL. Antibacterial activity also increased with extraction time, with the highest effectiveness observed at 6 days of maceration, achieving a bacterial reduction of 66.41%. Organoleptic evaluation indicated that the product was generally acceptable to panelists, with neutral to favorable responses. The optimal formulation was obtained at 6 days of maceration with a 1:2 ratio of betel leaf to lemongrass extract, producing favorable physicochemical properties and the highest antibacterial activity. This study demonstrates the potential of natural ingredients as eco-friendly and safe alternatives for floor cleaning products.
Strategi Penyesuaian Draft Heater terhadap Konsumsi Fuel Oil dan Emisi Gas Buang pada Heater Wendri Eko Nopri; Ratni Dewi; Ridwan Ridwan
Jurnal Teknologi Vol 26, No 1 (2026): April 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i1.8978

Abstract

Optimization of combustion systems in industrial heaters is essential to improve energy efficiency and reduce flue gas emissions. This study aims to analyze the effect of draft heater adjustment on fuel oil consumption and exhaust gas emissions in Heater. The method employed was a field experimental approach using a comparative analysis before and after optimization, through gradual reduction of damper opening and closure of air registers on inactive burners. Observed parameters included fuel oil consumption, excess O₂ levels, stack temperature, heater efficiency, and exhaust gas emissions. The results show that draft optimization significantly reduced fuel oil consumption from 1.1868 m³/h to 0.7345 m³/h, equivalent to a reduction of 38.1%. Heater efficiency increased from 67.35% to 72.26%, influenced by a decrease in excess air from 10.19% to 7.09% and a reduction in stack temperature from 253.5°C to 222.8°C. Furthermore, emissions of CO₂, NOx, and SOx were significantly reduced due to improved combustion quality and lower fuel consumption. This study concludes that draft heater adjustment through damper control and air register optimization is an effective strategy to simultaneously enhance energy efficiency and reduce emissions without requiring major equipment modifications. The findings are expected to serve as a practical reference for improving the performance and environmental sustainability of industrial heater operations..
Co-Authors Dewi, Ratni Jaida Tussakinah Nahar Nahar Wendri Eko Nopri